28481329152 has 144 divisors (see below), whose sum is σ = 83254855320. Its totient is φ = 9378889728.

The previous prime is 28481329141. The next prime is 28481329183. The reversal of 28481329152 is 25192318482.

28481329152 is a `hidden beast` number, since 2 + 8 + 481 + 32 + 91 + 52 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×28481329152² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28481329098 and 28481329107.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1520548 + ... + 1539164.

Almost surely, 2^28481329152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28481329152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41627427660).

28481329152 is an abundant number, since it is smaller than the sum of its proper divisors (54773526168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28481329152 is a wasteful number, since it uses less digits than its factorization.

28481329152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18728 (or 18705 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The spelling of 28481329152 in words is "twenty-eight billion, four hundred eighty-one million, three hundred twenty-nine thousand, one hundred fifty-two".